Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refnamediv>
<refname>systemd.mount</refname>
- <refpurpose>systemd mount configuration files</refpurpose>
+ <refpurpose>Mount unit configuration</refpurpose>
</refnamediv>
<refsynopsisdiv>
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
which define the execution environment the
<citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
- binary is executed in.</para>
+ binary is executed in, and in
+ <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ which define the way the processes are
+ terminated. Note that the User= and Group= options are
+ not particularly useful for mount units specifying a
+ <literal>Type=</literal> option or using configuration
+ not specified in <filename>/etc/fstab</filename>;
+ <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ will refuse options that aren't listed in
+ <filename>/etc/fstab</filename> if it is not run as
+ UID 0.</para>
<para>Mount units must be named after the mount point
directories they control. Example: the mount point
mounting. See
<citerefentry><refentrytitle>systemd.automount</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
- <para>If an mount point is beneath another mount point
+ <para>If a mount point is beneath another mount point
in the file system hierarchy, a dependency between both
units is created automatically.</para>
- <para>Mount points created at runtime independent on
- unit files or <filename>/etc/fstab</filename> will be
+ <para>Mount points created at runtime (independently of
+ unit files or <filename>/etc/fstab</filename>) will be
monitored by systemd and appear like any other mount
unit in systemd.</para>
+
+ <para>Some file systems have special semantics as API
+ file systems for kernel-to-userspace and
+ userspace-to-userpace interfaces. Some of them may not
+ be changed via mount units, and cannot be disabled.
+ For a longer discussion see <ulink
+ url="http://www.freedesktop.org/wiki/Software/systemd/APIFileSystems">API
+ File Systems</ulink>.</para>
</refsect1>
<refsect1>
<para>Mount units may either be configured via unit
files, or via <filename>/etc/fstab</filename> (see
<citerefentry><refentrytitle>fstab</refentrytitle><manvolnum>5</manvolnum></citerefentry>
- for details).</para>
+ for details). Mounts listed in
+ <filename>/etc/fstab</filename> will be converted into
+ native units dynamically at boot and when the
+ configuration of the system manager is reloaded. See
+ <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ for details about the conversion.</para>
<para>When reading <filename>/etc/fstab</filename> a
few special mount options are understood by systemd
which influence how dependencies are created for mount
- points from <filename>/etc/fstab</filename>. If
- <option>x-systemd.mount</option> is specified as mount
- option, then systemd will create a dependency of type
+ points from <filename>/etc/fstab</filename>. systemd
+ will create a dependency of type
<option>Wants</option> from either
<filename>local-fs.target</filename> or
<filename>remote-fs.target</filename>, depending
system. See
<citerefentry><refentrytitle>systemd.automount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for details. If
- <option>x-systemd-device-timeout=</option> is
+ <option>x-systemd.device-timeout=</option> is
specified it may be used to configure how long systemd
should wait for a device to show up before giving up
on an entry from
<filename>/etc/fstab</filename>. Specify a time in
- seconds or explicitly specifiy a unit as
+ seconds or explicitly specify a unit as
<literal>s</literal>, <literal>min</literal>,
<literal>h</literal>, <literal>ms</literal>.</para>
supervises. A number of options that may be used in
this section are shared with other unit types. These
options are documented in
- <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>. The
+ <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ and
+ <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>. The
options specific to the [Mount] section of mount
units are the following:</para>
<term><varname>Where=</varname></term>
<listitem><para>Takes an absolute path
of a directory of the mount point. If
- the mount point is not existing at
+ the mount point does not exist at the
time of mounting, it is created. This
string must be reflected in the unit
file name. (See above.) This option is
will be terminated forcibly via
SIGTERM, and after another delay of
this time with SIGKILL. (See
- <option>KillMode=</option> below.)
+ <option>KillMode=</option> in
+ <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>.)
Takes a unit-less value in seconds, or
a time span value such as "5min
20s". Pass 0 to disable the timeout
logic. Defaults to
90s.</para></listitem>
</varlistentry>
+ </variablelist>
- <varlistentry>
- <term><varname>KillMode=</varname></term>
- <listitem><para>Specifies how
- processes of this mount shall be
- killed. One of
- <option>control-group</option>,
- <option>process</option>,
- <option>none</option>.</para>
-
- <para>This option is mostly equivalent
- to the <option>KillMode=</option>
- option of service files. See
- <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
- for details.</para></listitem>
- </varlistentry>
+ <para>Check
+ <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ and
+ <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for more settings.</para>
+ </refsect1>
- <varlistentry>
- <term><varname>KillSignal=</varname></term>
- <listitem><para>Specifies which signal
- to use when killing a process of this
- mount. Defaults to SIGTERM.
- </para></listitem>
- </varlistentry>
+ <refsect1>
+ <title>Compatibility Options</title>
+
+ <para>The following option is also available in the
+ <literal>[Mount]</literal> section, but exists purely
+ for compatibility reasons and should not be used in
+ newly written mount files.</para>
+ <variablelist>
<varlistentry>
- <term><varname>SendSIGKILL=</varname></term>
- <listitem><para>Specifies whether to
- send SIGKILL to remaining processes
- after a timeout, if the normal
- shutdown procedure left processes of
- the mount around. Takes a boolean
- value. Defaults to "yes".
+ <term><varname>FsckPassNo=</varname></term>
+
+ <listitem><para>The pass number for
+ the file system checking service for
+ this mount. See
+ <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for more information on this setting.
</para></listitem>
</varlistentry>
</variablelist>
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.device</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ <citerefentry><refentrytitle>mount</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd-fstab-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry>
</para>
</refsect1>
~ianmdlvl / elogind.git / blobdiff